The United States Tennis Association has no love for the family of the man who created the National Tennis Center, erasing his legacy from the famed sports complex in Queens while squeezing his heirs for nearly half a million dollars, a lawsuit claims.

The children of William “Slew” Hester claim the USTA has violated a decades-old settlement agreement by demolishing their box in Arthur Ashe Stadium and offering “inferior” seats to the US Open — and only if they pay a whopping $460,000.

The stunning price tag left Hester’s surviving children, Bill and Kathryn, with no choice but to sue — for a second time — the organization their dad once led, they told The Post.

“It’s disappointing that the USTA’s current board doesn’t have a better understanding of who Slew Hester was, and what he did for the USTA and the US Open,” Bill Hester said.

A Mississippi oil man and one-time USTA president, Slew Hester was said to have been flying into NYC in the 1970s when he spotted what was then known as Singer Bowl, a city-owned facility used for the 1964 World’s Fair that had fallen into disrepair.

Hester met with city officials and convinced them to build what became Louis Armstrong Stadium to host the US Open, ripping the competition from the staid, private West Side Tennis Club in Forest Hills where it had been held and thrusting it onto a far more prominent — and lucrative — stage.

Construction was finished in a lightning fast 10 months, in time for the 1978 US Open.

A grateful USTA rewarded Hester lifetime box seats for him and his heirs; a memorial plaque gracing the entrance and a namesake restaurant, his family said in a federal lawsuit.

“There was no better seat in the house” than the Hester family box, which Slew “treasured,” his children said in court papers.

Hester and his kids attended the open every year at “The House That Slew Built” until his death in 1993 at age 80.

The USTA’s “attitude toward the Hester family changed” after his death, they alleged in Manhattan Federal Court papers.

When Arthur Ashe Stadium was built and became the main venue for the US Open, the USTA charged the family a $45,000 annual fee and stuck their seats “in a corner, with sightlines blocked by the umpire’s chair,” they alleged.

They sued, prompting a 1998 settlement agreement which included better seats in Box 35G, regular bus and restaurant passes, and continued lifetime rights to attend the Open as long as Bill and Kathryn are alive, continue to pay the fee, and the competition is held at the National Tennis Center, according to the legal filing.

“In the 30 years since, the USTA has at every turn worked to undermine the settlement agreement and freeze the Hesters out,” Bill and Kathryn alleged.

Not only did the price tag for their seats soar to a staggering $215,416 in 2025 — their box has since been eliminated in the $800 million renovation of the tennis center, which removed “all lower-bowl seating, including Box35G,” according to the lawsuit.

In December the USTA claimed the family’s only choice for 2026’s competition was to take regular seats costing $460,000 — a price tag which would jump to $560,000 by 2030.

“The USTA’s decision to eliminate the Hesters’ lifetime box and offer as a consolation prize inferior seats at more than double the cost is but the latest chapter in the USTA’s attempts to freeze the Hesters out and diminish Slew’s legacy,” they said in the lawsuit.

Adding injury to the already-Grand Slam level insult, the family claims Slew Hester’s memorial plaque has been removed.

“No explanation has ever been given to us as to why the plaque was taken down,” Bill Hester, 78, said.

“While the USTA does not comment on pending litigation, it should be noted that the USTA has fulfilled its commitment to the Hesters by providing them the opportunity to purchase seats in a location consistent with their prior seats and on the same basis as other purchasers,” a USTA spokesman said.